Google did not help, so asking here.
Got weird issue when having vanilla race and custom race, both having weird seam (like tanlines from swimsuit) on their buttocks. It shows both in Bodyslide and in-game. On vanilla races and custom. When testing, it is invisible in direct light but shows clearly when any shadow (seems light and shadows act differently on those seams, and that area is slightly different coloured than other bodyparts).
Using 3BA body, and vanilla race Diamond textures CBBE, custom race uses its own textures.
Have tried to figure out what affects both vanilla and custom races both. Is this physics mod issue (CBPC / HDT-SMP) or something in mesh underlayers (confused with BSA/UV), but it can't just be conflicting textures as both are on their separate folders and Vortex should not mix those (at least did not earlier).
Have tried to Vortex-reinstall almost all mods i can think related to this (3BA, Diamond textures, Racemenu, CPCB, HDT-SMP etc) but issue sticks.